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Agent skill

Swiftui Performance Audit

by harperreed in harperreed/dotfiles

Audit and improve SwiftUI runtime performance from code review and architecture.

No licenceAuto-check passedMobile

Install Swiftui Performance Audit

skills CLI
$ npx skills add harperreed/dotfiles --skill swiftui-performance-audit -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install harperreed/dotfiles swiftui-performance-audit --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/harperreed/dotfiles.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/swiftui-performance-audit .claude/skills/swiftui-performance-audit && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
swiftui-performance-audit
GitHub stars
334
Used in
8 other repos
Token cost
~1.4k tokens
SKILL.md length
500 words
Files
5 (incl. references)
Skills in repo
32
Repo updated
First seen
Licence
None found

At a glance

Audit and improve SwiftUI runtime performance from code review and architecture.

  • Works in 5 steps: Code-First Review → Guide the User to Profile → Analyze and Diagnose → …
  • Requests to diagnose slow rendering
  • SKILL.md covers Overview, Workflow Decision Tree, 1. Code-First Review and 2. Guide the User to Profile, plus 6 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Swiftui Performance Audit is an agent skill from harperreed/dotfiles. Audit and improve SwiftUI runtime performance from code review and architecture. Use for requests to diagnose slow rendering, janky scrolling, high CPU/memory usage, excessive view updates, or layout thrash in SwiftUI apps, and to provide guidance for user-run Instruments profiling when code review alone is insufficient.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/demystify-swiftui-performance-wwdc23.md`, `references/optimizing-swiftui-performance-instruments.md` and `references/understanding-hangs-in-your-app.md`).

It sits in Mobile, covering iOS development. It works with SwiftUI. The repository describes itself as: Dotfiles. Managed by YADM.

When your agent uses it

  • Requests to diagnose slow rendering
  • Janky scrolling
  • High CPU/memory usage
  • Excessive view updates

Example prompts

  • “/swiftui-performance-audit”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Code-First Review
  2. Guide the User to Profile
  3. Analyze and Diagnose
  4. Remediate
  5. Verify

What it can do on your machine

Read from SKILL.md and the folder at commit b78c10e. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are swift).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Swiftui Performance Audit loads about 1.4k tokens when it runs, and up to ~3.2k if it reads all its reference files. Until then it costs about 87 tokens; SKILL.md has 500 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~87
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~3.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 500 words (~1,360 tokens).

“Audit SwiftUI view performance end-to-end, from instrumentation and baselining to root-cause analysis and concrete remediation steps.”

— opening of SKILL.md by harperreed
name
swiftui-performance-audit

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (references) in .claude/skills/swiftui-performance-audit of harperreed/dotfiles.

  • SKILL.md
  • references/demystify-swiftui-performance-wwdc23.md
  • references/optimizing-swiftui-performance-instruments.md
  • references/understanding-hangs-in-your-app.md
  • references/understanding-improving-swiftui-performance.md

Open the folder on GitHubat commit b78c10e

Used in 8 other repositories

We found 9 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 8 other GitHub owners. This page covers the copy in harperreed/dotfiles, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Swiftui Performance Audit next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Swiftui Performance Audit compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Swiftui Performance Audit this skillharperreed/dotfiles3348 repos~1.4kAutomated safety check: PassNone
Swiftui Protwostraws/SwiftUI-Agent-Skill5.2k2 repos~1.5kAutomated safety check: PassMIT
Swiftui UI PatternsAFK-surf/OpenBridge4304 repos~887Automated safety check: PassMIT
Hig Project Contextraintree-technology/hig-doctor1435 repos~1.2kAutomated safety check: PassMIT
Hig Components Contentraintree-technology/hig-doctor1435 repos~1.3kAutomated safety check: PassMIT
Chunuiliseami/ChunUI531—~642Automated safety check: PassMIT

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Works with

Categories

Questions about Swiftui Performance Audit

What does Swiftui Performance Audit do?

Audit and improve SwiftUI runtime performance from code review and architecture. Swiftui Performance Audit is an agent skill from harperreed/dotfiles. Audit and improve SwiftUI runtime performance from code review and architecture.

When should I use Swiftui Performance Audit?

Swiftui Performance Audit fits situations like: requests to diagnose slow rendering; janky scrolling; high CPU/memory usage; excessive view updates.

How do I install Swiftui Performance Audit in Claude Code?

Run `npx skills add harperreed/dotfiles --skill swiftui-performance-audit -a claude-code`. Or copy the skill folder (.claude/skills/swiftui-performance-audit in harperreed/dotfiles) into .claude/skills/swiftui-performance-audit in your project. Claude Code loads it when a task matches its description.

How do I install Swiftui Performance Audit in Codex?

Run `npx skills add harperreed/dotfiles --skill swiftui-performance-audit -a codex`. Or copy the skill folder (.claude/skills/swiftui-performance-audit in harperreed/dotfiles) into .agents/skills/swiftui-performance-audit in your project. Codex loads it when a task matches its description.

Can I use Swiftui Performance Audit in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add harperreed/dotfiles --skill swiftui-performance-audit -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/swiftui-performance-audit, .gemini/skills/swiftui-performance-audit, .github/skills/swiftui-performance-audit and .opencode/skills/swiftui-performance-audit in your project.

What does Swiftui Performance Audit need to run?

SKILL.md names no scripts, command-line tools or credentials: Swiftui Performance Audit is instructions for the agent only.

Does Swiftui Performance Audit access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Swiftui Performance Audit safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Swiftui Performance Audit use?

No licence was found for Swiftui Performance Audit or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Swiftui Performance Audit use?

About 1.4k tokens (SKILL.md is roughly 5.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.8k tokens, read only when the agent opens those files.

What are the alternatives to Swiftui Performance Audit?

Skills that share tags, products or a category with Swiftui Performance Audit: Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.2k stars), Swiftui UI Patterns (AFK-surf/OpenBridge, 430 stars), Hig Project Context (raintree-technology/hig-doctor, 143 stars) and Hig Components Content (raintree-technology/hig-doctor, 143 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Swiftui Performance Audit?

harperreed (a GitHub user) maintains it in harperreed/dotfiles, which has 334 GitHub stars. The repository holds 32 skills in this directory. The repository was last updated on October 3, 2026.

Source: harperreed/dotfiles on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.